Pressure balance control method for coke oven gas collector

Abstract

The invention provides a pressure balance control method for a coke oven gas collector. The method comprises the following steps: setting preset values for pressure of the gas collector in an industrial personal computer, an opening range of an electric butterfly valve on the gas collector and the rotating speed range of a blast blower; detecting information of the actual pressure in the gas collector, the opening of the electric butterfly valve on the gas collector and the rotating speed of the blast blower, and transferring the detected information into the industrial personal computer; comparing the detected actual pressure in the gas collector with the preset pressure value stored in the industrial personal computer, so as to change the opening of the electric butterfly valve; when the opening of the electric butterfly valve is the maximal value, if the actual pressure in the gas collector still is greater than the preset value, improving the rotating speed of the blast blower by virtue of the industrial personal computer; and when the opening of the electric butterfly valve is the minimal value, if the actual pressure in the gas collector still is smaller than the preset value, reducing the rotating speed of the blast blower by virtue of the industrial personal computer. According to the pressure balance control method for the coke oven gas collector provided by the invention, the electric butterfly valve and the blast blower are adjusted by virtue of the industrial personal computer, so that closed loop control on the pressure in the gas collector is achieved; and stable pressure in the gas collector can be ensured.

Description

technical field [0001] The invention relates to a pressure balance control method of a coke oven gas collecting pipe. Background technique [0002] Raw coal produces coke in the high-temperature carbonization chamber of the coke oven, accompanied by a large amount of raw gas. The raw coal gas enters the bridge pipe through the ascending pipe of each carbonization chamber, and the bridge pipe is connected to the gas collection pipe, and then the raw coal gas flows into the suction pipe through the gas collection pipe. In practice, two or more gas collecting pipes are connected to the same suction pipe, a blower is connected to the suction pipe, and an electric butterfly valve is installed on the gas collecting pipe. After opening the electric butterfly valve on a gas collecting pipe, the gas collecting pipe can be connected with the suction pipe. By adjusting the opening of the electric butterfly valve, the flow area between the gas collecting pipe and the suction pipe can b...

AI Technical Summary

Problems solved by technology

[0003] The amount of coke oven gas generation changes periodically with the coke discharge operation of the coke oven, and during the coal charging operation, due to the opening and closing of the riser valve plate and the spraying of high-pressure ammonia water, it will cause damage to the gas collecting pipe. A large impact is likely to cause fluctuations in the pressure of the air collecting pipes, and even cause shocks between the air collecting pipes

The unstable pressure of the gas collecting pipe will bring difficulties to production. If the pressure is too high, it will cause smoke and fire above the furnace mouth; if the pressure is too low, it will cause the oxygen content of the gas to increase, which is not good for the operation of the electric tar collector.

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